JPH0759205B2 - Curved slide fastener chain and method for manufacturing curved slide fastener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a curved slide fastener to be used by being sewn on bags, children's bags, pockets of clothes and the like, and a curved slide fastener as a spare product thereof. The present invention relates to a method for manufacturing a chain.

[Conventional technology]

Conventionally, in the manufacture of a curved slide fastener, in the case of a metal fastener, the pitch (spacing) of each engagement tooth planted at one end edge of one fastener tape is increased, and the other fastener tape paired with this is increased. It has been practiced to reduce the pitch of each coupling tooth planted at one end edge to form a curved occlusal portion depending on the size of the pitch (see, for example, JP-A-59-103607). Further, in the case of a coil fastener, it is performed by heating with a heater to form a curved shape. Further, as a method other than the above, a method is used in which a fastener tape portion is cut and sewn, or a fastener tape having a different width is used.

[Problems to be Solved by the Invention]

As described above, in the case of forming the bent bite part by the size of the pitch, the manufacturing thereof is complicated and the cost is high, and a method of using a heater, a method of making a cut in the fastener tape part, and a fastener tape of different widths are used. However, the method generally has a problem that it is difficult to shape it into a desired curved shape, and sewing is troublesome.

Therefore, an object of the present invention is to provide a curved slide fastener chain that can be easily shaped and sewn into a desired curved shape (desired radius portion) and a method for manufacturing a curved slide fastener.

A further object of the present invention is to provide a curved slide fastener chain and a method of manufacturing a curved slide fastener, which can be easily shaped into a desired curved shape on the spot at the time of sewing.

[Means for Solving the Problems]

According to the present invention, in order to achieve the above-mentioned object, at least one of a plurality of coupling teeth is implanted along one side edge of a pair of fastener tapes made of solvent-swellable fiber, and the plurality of coupling teeth are arranged. A fastener chain in which the two are engaged with each other, a solvent or an aqueous solution thereof is applied to a solvent swellable fiber fastener tape of any one of the pair of fastener tapes, and then, after shaping the fastener chain into a predetermined curved shape, A method for manufacturing a curved slide fastener chain is provided, which is characterized in that the fastener chain is sewn on a cloth.

Further, according to the present invention, a plurality of coupling teeth are planted along one side edge of a pair of fastener tapes, at least one of which is made of solvent-swellable fiber, and a fastener chain in which the plurality of coupling teeth are engaged with each other. Of the pair of fastener tapes, a solution containing a solvent and a soluble welding agent is applied to one of the solvent swellable fiber fastener tapes, and the fastener chain is shaped into a predetermined curved shape. A method of manufacturing a curved slide fastener chain characterized by further comprising a plurality of coupling teeth at least one of which is planted along one side edge of a pair of fastener tapes made of solvent swellable fibers. Of the above-mentioned pair of fastener tapes of the fastener chain in which the two are interlocked with each other, the solvent-swellable fiber fastener tape is used as a solvent. Is coated with the aqueous solution, followed by after shaping the fastener chain in a predetermined curved shape, manufacturing method of the bending slide fastener chain being characterized in that an adhesive is applied to the fastener tape is provided.

Further, according to the present invention, the curved slide fastener chain manufactured by each of the above-mentioned methods is mounted with sliders, upper stoppers and lower stoppers to finish the slide fastener of a predetermined length. Manufacturing method, or in each of the above-mentioned methods, in place of the fastener chain, a slider fastener having a predetermined length in which sliders, upper stoppers and lower stoppers are attached to the fastener chain is used. Will be provided.

[Operation and Mode of Invention]

In the method of the present invention, a solvent-swellable synthetic fiber (for example, a polyurethane fiber) is expanded (swelled) by treating with a solvent.
It is formed into a curved shape by utilizing the property of That is, by applying a solvent to the tape part of the fastener stringer on one side of the slide fastener chain using the fastener tape in which the polyurethane fiber is woven (or woven) in the warp direction, only the one side of the fastener tape has the polyurethane fiber. Expands in the longitudinal direction as it expands, and as a result, the slide fastener chain can be shaped into a curved shape very easily.

This will be described below with reference to the drawings. FIG. 1 (A)-
(E) shows one method of the present invention in the order of steps,
In the figure, 2 and 3 represent a fastener tape in which a yarn of a polyurethane fiber which is a solvent-expandable fiber is woven in the warp direction,
A plurality of engaging teeth 4 are planted along one side edge of the pair of fastener tapes, and the engaging teeth 4 are engaged with each other to form a fastener chain 1 (FIG. 1 (A)). The drawing shows a fastener chain having a unit length. Next, of the pair of fastener tapes 2 and 3, one or both fastener tapes 2 and 3 are coated with a solvent or an aqueous solution thereof by a suitable method such as spraying or brushing. For convenience of explanation, FIG. 1 (B) shows a case where, for example, one of the fastener tapes 2 is coated with a solvent, and the coated portion is shaded. After a while (usually about several seconds), the polyurethane fiber yarn expands (swells) and can be easily shaped into a predetermined curved shape (FIG. 1 (C)). Then, in order to fix this, the fastener chain 1 shaped into a predetermined curved shape is sewn on the cloth 5 (FIG. 1 (D)). When left in this state for a while, the solvent that has penetrated into the fastener tape 2 evaporates, and a curved slide fastener chain having a predetermined curvature is obtained (FIG. 1 (E)). The radius of curvature (curvature) of the curved slide fastener chain can be arbitrarily adjusted depending on the amount of solvent applied and the type of solvent. Further, as is clear from the above description of the operation, the method of the present invention is applicable if at least one of the pair of fastener tapes is made of solvent-swellable fiber.

Although fixing by sewing is shown in FIG. 1, a method of fixing by solidifying the resin using a resin adhesive is also possible. That is, according to the second method of the present invention, a fastener tape made of a solvent-swellable fiber of any one of a pair of fastener tapes is coated with a solvent containing a solvent and having a soluble adhesive dissolved therein. A bent slide fastener that is solidified into the predetermined curved shape by shaping the fastener chain into a predetermined curved shape by utilizing expansion (swelling) of the fastener tape by the solvent, and then solidifying the adhesive after the solvent is evaporated. You get a chain. Further, according to the third method of the present invention, after the fastener chain is shaped into a predetermined curved shape as shown in FIGS. 1 (A) to (C), an adhesive is applied to the fastener tape 2 to fix it. By
A curved slide fastener chain is obtained. As the adhesive, a urethane-based adhesive or the like can be used. Particularly, when a hot-melt type adhesive is used, an advantage that the degree of curvature can be corrected by heating later can be obtained.

According to the present invention, the bending slide fastener chain manufactured by each of the above methods, by attaching each component of the slider, the top stopper, and the bottom stopper, or by applying the above methods to the existing slide fastener, A bent slide fastener can be easily manufactured.

As the solvent to be applied to the fastener tape, any solvent can be used as long as it can swell the fiber threads of the fastener tape, but it is preferable to use a solvent that does not cause deterioration of the fiber, decrease in strength, or the like. Specifically, for example, alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol and benzyl alcohol, ketones such as acetone and methyl ethyl ketone, ethers such as diethyl ether, n-
Hydrocarbon-based solvents such as hexane and petroleum ether, cyclic compounds such as toluene, xylene, aniline and tetrahydrofuran, halides such as trichloroethane, chloroform and carbon tetrachloride, fatty acids such as n-butyl acetate and acetic acid, and the like. Esters and inorganic acids can be used.

〔Example〕

Hereinafter, the present invention will be specifically described with reference to Examples and Test Examples.

Examples 1 to 9 Polyurethane fiber knitted 20 mm wide and 10 mm wide elastic tapes (showing 10% elongation under a load of 410 g) were planted with a coupling tooth along one side edge of the elastic tapes. A fastener chain was manufactured by engaging the engagement teeth with each other. The overall width of the obtained fastener chain is 33 mm.

Then, an appropriate amount of each of the solvents shown in Table 1 was applied to one 20 mm wide tape portion of the fastener chain (three times with a brush), and immediately after that, the chain bias was measured.
The measurement state of the chain bias H _L is as shown in FIG. 2, where L = 150 mm and t = 33 mm.

The results are also shown in Table-1.

The obtained fastener chain was shaped by hand into a curved shape and fixed by sewing to a cloth or by applying a polyurethane adhesive to manufacture a curved slide fastener chain.

As is clear from the results shown in Table 1 above, the elongation percentage (expansion) of the tape varies depending on the type of solvent used.
Therefore, by appropriately selecting the solvent to be used, the desired degree of bending can be adjusted.

Test Example 1 The influence of solvent immersion on a tape alone was examined. First, the elastic tape used in the above example was initially loaded with 15
Attach a weight of g and measure the distance of 20 cm at that time.

Then, soak in various solvents shown in Table-2 for 30 seconds, air-dry for 90 seconds,
Elongation is measured after 2 minutes up to 12 minutes and after 20 minutes at 2 minute intervals. The results are shown in Table-2.

From the above results, it can be seen that there are differences in the effect on the tape strength and the evaporation rate of the solvent depending on the type of solvent. In addition,
In all cases, no discoloration of the tape due to the immersion in the solvent was observed.

Example 10 Using the materials shown in Table-3 as the material of the fastener tape used, except that various solvents shown in Table-4 are used,
A fastener chain is manufactured in the same manner as in the above embodiment,
Similarly, the chain bias was measured, and the results are shown in Table-4.
Are also shown. Further, the influence of the immersion of the tape alone in the solvent was examined in the same manner as in Test Example 1 above. The results are shown in Table-5.

As is clear from the results shown in Tables 4 and 5 above,
The present invention can be applied to the case of tape made of solvent swellable fiber such as polyurethane fiber.

〔The invention's effect〕

As described above, the method for manufacturing the curved slide fastener chain of the present invention is to apply the solvent to at least one of the pair of fastener tapes made of the solvent-swellable fiber,
One of the applied fastener tapes swells with solvent,
Since it is shaped and fixed in a curved shape by utilizing the property of expanding, it is possible to manufacture a bent slide fastener chain and a bent slide fastener extremely easily.
The curve part can be easily sewn and the finish is improved, and the size of the curve can be arbitrarily adjusted by appropriately changing the type of solvent and the coating amount.

In addition, it can be applied as it is to the slide fastener of the warp stretch that already exists as an item now, and by spraying and applying a solvent at the time of sewing, the bent slide fastener can be sewn on the spot in any bending condition.

Furthermore, by using an adhesive for fixing as in claims 2 and 3, there is an advantage that the slide fastener chain or slide fastener shaped into a desired curved shape can be easily fixed in that state.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a step of one method of the present invention, and FIG. 2 is an explanatory diagram of chain bias measurement.

Claims (6)

[Claims] 1. A fastener chain in which a plurality of coupling teeth are planted along one side edge of a pair of fastener tapes, at least one of which is made of solvent-swellable fiber, and the coupling teeth are engaged with each other. Of the pair of fastener tapes,
At least one of the solvent-swellable fiber fastener tapes is coated with a solvent or an aqueous solution thereof, then the fastener chain is shaped into a predetermined curved shape, and then the fastener chain is sewn into a cloth. Slide fastener chain manufacturing method. 2. A fastener chain in which a plurality of coupling teeth are planted along one edge of a pair of fastener tapes, at least one of which is made of solvent-swellable fiber, and the coupling teeth are engaged with each other. Of the pair of fastener tapes,
A method for producing a curved slide fastener chain, characterized in that at least one solvent-swellable fiber fastener tape is coated with a solution containing a solvent and a soluble welding agent is dissolved to shape the fastener chain into a predetermined curved shape. . 3. A fastener chain in which a plurality of coupling teeth are planted along one side edge of a pair of fastener tapes, at least one of which is made of a solvent-swellable fiber, and the coupling teeth are intermeshed with each other. Of the pair of fastener tapes,
At least one solvent-swellable fiber fastener tape is coated with a solvent or an aqueous solution thereof, and then the fastener chain is shaped into a predetermined curved shape, and then a fastener is applied to the fastener tape. Fastener chain manufacturing method. 4. A slider fastener having a predetermined length is attached to a curved slide fastener chain manufactured by the method according to any one of claims 1, 2 and 3 to attach a slider, an upper stopper and a lower stopper. A method for manufacturing a curved slide fastener, which is characterized by the following. 5. The method according to claim 1, 2 or 3, wherein the fastener chain is replaced with a slider, and a slide of a predetermined length in which each of a top stopper and a bottom stopper is attached to the fastener chain. A method of manufacturing a bent slide fastener, which comprises using a fastener. 6. The solvent is methyl alcohol, ethyl alcohol, isopropyl alcohol, benzyl alcohol,
Acetone, methyl ethyl ketone, diethyl ether, n
-At least one solvent selected from the group consisting of hexane, petroleum ether, toluene, xylene, aniline, tetrahydrofuran, trichloroethane, chloroform, carbon tetrachloride, n-butyl acetate, and acetic acid. 5. The method according to any one of 5 above.